hello i m trying to define custom gradle task that accepts o

Question

hello i m trying to define custom gradle task that accepts output file name and generates corresponding output file according to some logic e g ``` Input Option option = outputFileName description = target file name val outputFileName Property lt String gt = project objects property String class java Suppress UnstableApiUsage Internal OutputFile val outputFile RegularFileProperty = project objects fileProperty ``` How do I properly initialize the `outputFile` with the specified `outputFileName`

octylFractal · Answer

`init ` block + a regular file can be constructed using

Dariusz Kuc · Answer

something like ```init outputFile = project objects fileProperty fileValue File outputFileName getOrElse whatever ```

octylFractal · Answer

I mean you can leave the initializer as is

octylFractal · Answer

I was specifically suggesting `convention Provider lt RegularFile gt `

octylFractal · Answer

`outputFile convention project layout projectDirectory file outputFileName getOrElse whatever `

Dariusz Kuc · Answer

getting type mismatch required `File` but got `RegularFile`

octylFractal · Answer

are you sure I explicitly wrote that to use `RegularFile`

octylFractal · Answer

Dariusz Kuc · Answer

``` Internal OutputFile val outputFile RegularFileProperty = project objects fileProperty init outputFile convention project layout projectDirectory file outputFileName getOrElse whatever ```

Dariusz Kuc · Answer

intellij complains about it

Dariusz Kuc · Answer

guess can do regular file as file

octylFractal · Answer

what part is requiring a File

Dariusz Kuc · Answer

convention

Dariusz Kuc · Answer

also it looks like this doesn t work with cli

Dariusz Kuc · Answer

always uses the else

octylFractal · Answer

that s odd what version of Gradle are you on

octylFractal · Answer

`RegularFileProperty convention` uses `RegularFile` in 6 1 1

Dariusz Kuc · Answer

6 0 1

octylFractal · Answer

it s the same

octylFractal · Answer

sounds like you have other issues at play

Dariusz Kuc · Answer

let me check if intellij picks the correct one or not

Dariusz Kuc · Answer

k settings point to gradle wrapper which points to version 6 1

Dariusz Kuc · Answer

brb

Dariusz Kuc · Answer

k issue was lambda ` ` vs value set ` `

octylFractal · Answer

oh right Provider isn t a functional interface

octylFractal · Answer

it won t work properly without the lambda

octylFractal · Answer

it initializes too early

Dariusz Kuc · Answer

so the remaining problem is how to get cli working

Dariusz Kuc · Answer

i e when task is evaluated it always goes to the else

octylFractal · Answer

wrap the lambda in `project provider `

octylFractal · Answer

that should work

Dariusz Kuc · Answer

crossed fingers

Dariusz Kuc · Answer

you mean `project provider convention ` didn t like it

Dariusz Kuc · Answer

apologies if i m asking very basic questions

Dariusz Kuc · Answer

its pretty confusing to me

octylFractal · Answer

no like I had above but the ` ` wrapped in `project provider` e g `outputFile convention project provider `

octylFractal · Answer

you re converting a lambda to a `Callable` via implicit Single Abstract Method SAM Conversion then `project provider ` converts that to a `Provider` which `outputFile convention ` can then take

Dariusz Kuc · Answer

if i wrap that in project provider then i got provider of a provider of a regular file disappointed

octylFractal · Answer

why

octylFractal · Answer

the lambda should be returning a RegularFile

octylFractal · Answer

oh wait this is way simpler

octylFractal · Answer

`outputFile convetion project layout projectDirectory file outputFileName `

Dariusz Kuc · Answer

doh

octylFractal · Answer

and you should the convention for `outputFileName` to whatever

octylFractal · Answer

then you don t need `getOrElse`

Dariusz Kuc · Answer

yeah the problem is the get or else

Dariusz Kuc · Answer

k gotcha

Dariusz Kuc · Answer

using convention i can set the default value if it is not specified

Dariusz Kuc · Answer

awesome

Dariusz Kuc · Answer

you are the best

Dariusz Kuc · Answer

thanks for the help

Dariusz Kuc · Answer

btw since i don t want to let people mutate the output file I changed it to ``` OutputFile val outputFile Provider lt RegularFile gt = outputFileName map name gt project layout projectDirectory file name ```

Dariusz Kuc · Answer

thanks